 .backgroundView {
     width: 100%;
     height: 100%;
     position: fixed;
     overflow-y: hidden;
     background-color: rgba(0, 0, 0, 0.5);
     z-index: 4;
     top: 0;
     display: flex;
     justify-content: center;
     align-items: center;
 }

 .viewcontent {
     background-color: white;
     z-index: 5;
     top: 50%;
     width: 670rpx;
     margin: auto;
     height: 200rpx;
     border-radius: 25rpx;
 }